Skulls show New World was settled twice: study

Two distinct groups from Asia settled in the New World and not one single migration as suggested by previous genetic studies, experts said Monday after comparing the skulls of early Americans.

Paleoanthropologists from Brazil, Chile and Germany compared the skulls of several dozen Paleoamericans, dating back to the early days of migration 11,000 years ago, with the more recent remains of more than 300 Amerindians.

Their landmark research found differences in the cranial morphology that could only be explained by the fact that the last common ancestor of the Early and Late Native American groups came from outside the continent....